<template>
  <div class="login">
    <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
      <!--标题-->
      <h3 class="title">宁夏档案馆固定资产及设备管理系统</h3>

      <!--账号输入框-->
      <el-form-item prop="username">
        <el-input
                v-model="loginForm.username"
                type="text"
                size="large"
                auto-complete="off"
                placeholder="账号"
        >
          <template #prefix>
            <svg-icon icon="user"/>
          </template>
        </el-input>
      </el-form-item>

      <!--密码输入框-->
      <el-form-item prop="password">
        <el-input
                v-model="loginForm.password"
                type="password"
                size="large"
                auto-complete="off"
                placeholder="密码"
                @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon icon="password"/>
          </template>
        </el-input>
      </el-form-item>

      <!--验证码-->
      <el-form-item prop="code">
        <el-input
                v-model="loginForm.code"
                size="large"
                auto-complete="off"
                placeholder="验证码"
                style="width: 63%"
        >
          <template #prefix>
            <svg-icon icon="validCode"/>
          </template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img" alt="加载中"/>
        </div>
      </el-form-item>

      <!--记住密码checkbox-->
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0 0 25px 0;">记住密码</el-checkbox>

      <!--登录按钮-->
      <el-form-item style="width:100%;">
        <el-button
                size="large"
                type="primary"
                style="width:100%;"
                @click.prevent="handleLogin"
        >
          <span>登 录</span>
        </el-button>
      </el-form-item>
    </el-form>
    <!-- 底部 -->
    <div class="el-login-footer">
      <span>Copyright © 2022 Powered By Leo</span>
    </div>
  </div>
</template>

<script setup>
import { ref } from 'vue'
import requestUtil from '@/util/request'
import store from '@/store'
import { ElMessage } from "element-plus"
import qs from 'qs'
import router from '@/router'
import Cookies from "js-cookie";
import { decrypt, encrypt } from "@/util/jsencrypt";

const loginRef = ref(null)

/**
 *初始化
 */
const loginForm = ref({
  username: "",
  password: "",
  rememberMe: false,
  code: "",
})

/**
 * 表单验证规则
 */
const loginRules = {
  username: [{required: true, trigger: "blur", message: "请输入您的账号"}],
  password: [{required: true, trigger: "blur", message: "请输入您的密码"}],
  code: [{required: true, trigger: "blur", message: "请输入验证码"}]
};

/**
 * 登录方法
 */
const handleLogin = () => {
  loginRef.value.validate(async (valid) => {
    if (valid) {
      if (loginForm.value.code === captcha.value) {
        console.log(loginForm.value.code);
        // 将信息存入到cookie中
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set("username", loginForm.value.username, {expires: 30});
          Cookies.set("password", encrypt(loginForm.value.password), {expires: 30});
          Cookies.set("rememberMe", loginForm.value.rememberMe, {expires: 30});
        } else {
          // 否则移除
          Cookies.remove("username");
          Cookies.remove("password");
          Cookies.remove("rememberMe");
        }
        let result = await requestUtil.post("login?" + qs.stringify(loginForm.value))
        let data = result.data;
        if (data.code === 200) {
          const token = data.authorization;
          store.commit('SET_TOKEN', token);
          const userInfo = data.currentUser;
          store.commit('SET_USERINFO', userInfo);
          ElMessage.success(data.msg)
          await router.replace("/home")
        } else {
          ElMessage.error(data.msg)
        }
      } else {
        ElMessage.error("验证码错误！");
        await getCode();
      }
    } else {
      ElMessage.error("请填写信息！！")
    }
  })
}

const captcha = ref("")
const codeUrl = ref("")
const getCode = async () => {
  const res = await requestUtil.get("captcha");
  captcha.value = res.data.captcha;
  codeUrl.value = res.data.base64Img;
}
getCode();

/**
 * 从cookie中拿到数据
 */
function getCookie() {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  };
}

getCookie();
</script>

<style lang="scss" scoped>
a {
  color: white
}

.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-bg-2.jpg");
  background-size: cover;
}

.title {
  margin: 0 auto 30px auto;
  text-align: center;
  color: #707070;
  font-weight: 600;
  font-size: 20px;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;

  .el-input {
    height: 40px;

    input {
      display: inline-block;
      height: 40px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>
